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ella [17]
3 years ago
7

HELP ME PLEASE!!!

Biology
1 answer:
Sidana [21]3 years ago
5 0

Answer:

The way I would separate the shell fragments from the sand would be by using a filter. As shell fragments are larger than sand. So I would use a filter with 2 mm spaces to separate them. Now, for the sand separation from the water, I would heat the water so it would evaporate and connect a tube to another recipient making the sand stay in the first tube and the water vapor cools in the tube to precipitate in the other recipient. Three mixtures I have prepared at home are chocolate milk, coffee and cream, and lemon juice and tea.

Explanation:

To understand this answer we have to remember a few things. First, mixtures always have solute and solvent. The solvent is the most liquid component of the mixture and it can incorporate the more solid element in its composition to carry it. Now, there are several methods to separate them, barrier methods like filters are the first and more basic ones, as they are aimed to separated big solutes. While evaporation can be used to separate two very liquid elements. Like distillation of alcohol to separate the most concentrated oil from the alcohol.

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<h2>Answer:</h2>

False

<h2>Explanation:</h2>

Water is perhaps the most important component of any ecosystem. All living organisms need water to grow and survive. The organisms involved in this cycle are plants, animals, bacteria and decomposers. All of them use water for their own processes and functions. The processes involved are evaporation, condensation, sublimation, precipitation, transpiration, runoff, and infiltration. Since plants and animals both need water in very greater amount therefore we cannot neglect their importance in water cycle.

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3 years ago
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Explanation:

1.These reactions occur within specialised membrane discs within the chloroplast called thylakoids and involve three steps: Excitation of photosystems by light energy. Production of ATP via an electron transport chain. Reduction of NADP+ and the photolysis of water.

2.The cyclic light-dependent reactions occur only when the sole photosystem being used is photosystem I. Photosystem I excites electrons which then cycle from the transport protein, ferredoxin (Fd), to the cytochrome complex, b6f, to another transport protein, plastocyanin (Pc), and back to photosystem

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4.The two products of the light-dependent reactions of photosystem are ATP and NADPH. The movement of high energy electrons releases the free energy that is needed to produce these molecules. The ATP and NADPH are used in the light-independent reactions to make sugar.

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A is a DNA sequence where RNA polymerase binds and begins the process of transcription. A is a DNA sequence that binds regulator
WARRIOR [948]

<u>Answer:</u>

A is a DNA sequence that binds regulatory proteins that interact with promoter-bound proteins to activate transcription.

<u>Explanation:</u>

Background Knowledge:

DNA contains genes which is a particular segment of DNA. A gene usually has regulatory regions and a structural region.

Promoter: The regulatory region located to the 5 prime end of coding strand of the gene which is called as promoter that controls the binding RNA Polymerase during transcription.

The Terminator is the other regulatory region, located to the 3 prime end of coding strand of the gene. The terminator region causes RNA polymerase to stop transcription.

Structural region is the region present between the promoter and terminator.

Answer of the question is:

A is a DNA sequence that binds regulatory proteins that interact with promoter-bound proteins to activate transcription.

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